Buddha was Born in Nepal in the 6th century B.C ,no doubt.

 “Buddha was born in Lumbini which is in Nepal at present”. Saying Buddha was born in Nepal is correct .I think there is no doubt..

Buddha was Born in Nepal in the 6th century B.C., Buddha was a spiritual leader and teacher whose life serves as the foundation of the Buddhist religion

“I teach because you and all beings want to have happiness and want to avoid suffering. I teach the way things are.”
– The Buddha